The vertical and horizontal distribution of four species of the genus Gnathophausia (Crustacea: Mysidacea) in the eastern North Atlantic Ocean

The occurrence of four species of the genus Gnathophausia takenin several series of vertically discrete hauls in the easternNorth Atlantic is discussed. The five sets of samples describedhere were taken at the following positions: (i) six stationsbetween 11 and 60°N, close to the 20°W meridian; (ii)three other stations between 42 and 55°N; (iii) stationsin the North West African upwelling area; (iv) five stationsacross the Azores Front at 30–35 30–34°W; (v)three stations close to an area of weak hydrographic frontsbetween 39–40°N 15°W and 45–46 14°W.Distribution of species above 1500–2000 m are describedand, where possible, correlated with the hydrographic regime.